Year	constant 2010 US$
1990	2247.66014513857
1991	1999.95492986868
1992	1905.37898719049
1993	1931.70174315163
1994	2007.82600158155
1995	2248.32409304609
1996	2425.19708277195
1997	2320.51836032795
1998	2464.29982189032
1999	2364.62837102203
2000	2404.28740023594
2001	2641.31999413119
2002	2880.98861745741
2003	3145.01924411746
2004	3664.0168913678
2005	4100.56321121271
2006	4545.95299809533
2007	5252.19615187397
2008	5805.19696037737
2009	5481.98291755386
2010	5239.57160095916
2011	5339.18156477495
2012	5469.33650961743
2013	5497.73504898408
2014	5778.44028597418
2015	6151.75055547373
2016	6674.94916156615
2017	7388.64510509278
2018	7821.43356065105